Effect of deep cryogenic treatment on the microstructure and mechanical properties of Al–Cu–Mg–Ag alloy
Jian Wang, Jingpei Xie, Douqin Ma, Zhiping Mao, Tingting Liang, Puyou Ying, Aiqin Wang, Wenyan Wang
Abstract
Effect of deep cryogenic treatment (DCT) on the aging behavior and tensile properties of Al-Cu-Mg-Ag alloy was investigated. Results show that DCT of Al-Cu-Mg-Ag alloy produces plastic deformation of about 0.2% and high-density dislocations in the α-Al matrix. These dislocations cut second-phase particles in under-aged Al-Cu-Mg-Ag alloy, resulting in a decrease in the size of Ω precipitates and an increase in the number density, thereby weakening the adverse effects of DCT on the tensile properties of the alloy.
Topics & Concepts
Materials scienceAlloyCryogenic treatmentMicrostructureUltimate tensile strengthDislocationMetallurgyPhase (matter)Deformation (meteorology)Composite materialOrganic chemistryChemistryMetal Alloys Wear and PropertiesAluminum Alloy Microstructure PropertiesMicrostructure and mechanical properties